How many years have you worked here?____ten years ago.

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How many years have you worked here?____ten years ago.
为什么不能用Before而要用since?

ten years ago是一个时间点,也就是十年前.而加上before,那就是10年前还要之前,光从意义上来讲就行,你说对不?
before指的是某个时间点以前的时间,而since指的是某个时间点以后的时间.
这里很明显是说从十年前到现在,所以用since.
希望我的解释你能明白.

How many years have you worked here?____ten years ago. 造句 How many years ago Mrs Li____(live) here many years ago. he worked here three years ago用since three years ago改写句子纠错 ---How soon have you lived here? ----For three years. I have studied here （）many years ago. A. since B. for C, be many+years+ago是什么意思【英语选择】I have no idea how many years ago ___the custom begain many years many years ago意思 13.- How long have you worked here? 英语翻译I would have you know,then,that a great many years ago t 连词成句 years people did travel how ago many?